Air
Air pollution is recognized as one of the major environmental issues because it causes acid rain and photochemical smog as well as direct inhalation. In order to prevent air pollution, it is important to monitor the air and its sources. We provides analytical equipment and solutions that can monitor not only the atmospheric environment, but also the working environment and sources of emissions.
Measuring fluorotelomer alcohols by thermal desorption-gas chromatography-tandem mass spectrometry
Journal of Chromatography A Volume 1769, 22 February 2026, 466725
Fluorotelomer alcohols (FTOHs) are a group of volatile and semi-volatile per- and polyfluoroalkyl substances
(PFAS) commonly found in indoor air and contribute to PFAS inhalation exposure. Improving our understanding
of the contribution of FTOHs to human exposure to PFAS indoors is of high interest. Consensus standard test
methods play an essential role in environmental risk assessment and management. We present the outcome of an
international interlaboratory study (ILS) conducted with nine laboratories to evaluate the precision of ASTM
International Standard Test Method D8591. The ILS was organized by the United States Environmental Protection
Agency. The test method specifies the analysis of four FTOHs (4:2, 6:2, 8:2 and 10:2 FTOH) collected on
PFAS-specific thermal desorption tubes by gas chromatography coupled with tandem mass spectrometry. During
the ILS, participating laboratories were instructed to use the test method to analyze three samples (A, B, and C),
each three times. Each sample contained the target FTOHs at defined concentrations unknown to the laboratories.
The results from seven laboratories show that the relative reproducibility standard deviation (RSDR) of the
method ranges from 14% to 26% and the relative repeatability standard deviation (RSDr) ranges from 4.6% to
11%, with RSDs decreasing with decreasing volatility of the FTOHs. Bias ranged from -13% to 6.0% and was
generally larger and negative for less volatile FTOHs. The test method in conjunction with the precision statistics
from this ILS will provide a reliable, defendable method that can be used in the context of studying PFAS sources,
transport, and human exposure.
It is necessary to take measures to prevent people from being exposed to substances causing sick house syndrome and toxic substances in the work environment such as painting, and to prevent health problems. Examples of analysis and measurement of regulated substances, hazardous substances, and ventilation in indoor and work environments are introduced.
Air pollution has long been a major problem, and it is necessary to maintain and conserve the air environment. In recent years, global warming has become one of the important issues. Here are some examples of analysis of various substances in the atmospheric environment, such as aldehydes, volatile organic compounds (VOCs), and greenhouse gases (GHGs).
Air pollution is caused by pollutants emiimportant to monitor the sources to prevent tted from sources such as automobiles and plants, so it is air pollution. Here, we will introduce an example of analysis of substances in the exhaust gas of automobiles and particles in the exhaust gas.